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Advanced Gastroenterology & Liver Institute in Anaheim, Santa Ana, and Huntington Beach, California, provides comprehensive gastroenterology care. People travel from all over to consult with Tahmina Haq, MD, who is well-known for her compassionate care and clinical expertise.

At Advanced Gastroenterology & Liver Institute, Dr. Haq specializes in diagnosing and treating digestive disorders like Crohn’s disease, ulcerative colitis, and hepatitis. She also performs a number of diagnostic procedures, including upper endoscopy, endoscopic ultrasound, and endoscopic retrograde cholangiopancreatography (ERCP). 

In addition, people come to Advanced Gastroenterology & Liver Institute for colon cancer screenings and treatment of colon polyps. Dr. Haq has a high adenoma detection rate of 65%, increasing her patients’ protection against colon cancer.

After earning her Doctor of Medicine at Shifa College of Medicine in Rawalpindi, Islamabad, Pakistan, Dr. Haq completed her internal medicine residency at Loma Linda University Medical Center in Loma Linda, California. 

She then completed her gastroenterology fellowship at the University of California, San Francisco (UCSF) and her advanced endoscopy fellowship at Harbor-UCLA Medical Center in West Carson, California.

Dr. Haq takes the time to get to know her patients, building trust and long-lasting relationships. When not taking care of her patients, Dr. Haq enjoys traveling and spending time with her family.

Call Advanced Gastroenterology & Liver Institute or use the online booking button to schedule an appointment today.

Jay P. Diliberto, MD, is a board-certified gastroenterologist with 30 years of experience in the treatment of hemorrhoids. His level of expertise is second to none in the Huntington Beach, California, area.

Dr. Diliberto received his medical degree from the University of Massachusetts in Worcester, Massachusetts. Following graduation, he studied Internal Medicine at Cedars-Sinai Medical Center and Gastroenterology at the University of California, Los Angeles (UCLA) in 1992. He currently works and resides in Huntington Beach, California.

Since training under the supervision of experts while at UCLA, Dr. Diliberto has had a special interest in the treatment of hemorrhoids. With over 7000 patient experiences, he has become a leading expert in the area. 

At his practice, Dr. Diliberto is also highly skilled in the diagnosis and treatment of a wide range of gastrointestinal conditions, including acid reflux, irritable bowel syndrome (IBS), and diverticulosis, to name a few. He is affiliated with Hoag Memorial Hospital Presbyterian, Newport Coast Surgical Institute, and Prime Surgery Center of Newport Beach. 

Dr. Diliberto welcomes all new and existing patients to his practice, Jay P. Diliberto, MD Inc. He accepts Medicare and most PPO insurance plans but is not part of any HMO plans. For HMO patients, he provides a significantly discounted fee that is based on Medicare reimbursement.

Advanced Gastroenterology & Liver Institute in Anaheim, Santa Ana, and Huntington Beach, California, provides comprehensive gastroenterology care. People travel from all over to consult with Tahmina Haq, MD, who is well-known for her compassionate care and clinical expertise.

At Advanced Gastroenterology & Liver Institute, Dr. Haq specializes in diagnosing and treating digestive disorders like Crohn’s disease, ulcerative colitis, and hepatitis. She also performs a number of diagnostic procedures, including upper endoscopy, endoscopic ultrasound, and endoscopic retrograde cholangiopancreatography (ERCP). 

In addition, people come to Advanced Gastroenterology & Liver Institute for colon cancer screenings and treatment of colon polyps. Dr. Haq has a high adenoma detection rate of 65%, increasing her patients’ protection against colon cancer.

After earning her Doctor of Medicine at Shifa College of Medicine in Rawalpindi, Islamabad, Pakistan, Dr. Haq completed her internal medicine residency at Loma Linda University Medical Center in Loma Linda, California. 

She then completed her gastroenterology fellowship at the University of California, San Francisco (UCSF) and her advanced endoscopy fellowship at Harbor-UCLA Medical Center in West Carson, California.

Dr. Haq takes the time to get to know her patients, building trust and long-lasting relationships. When not taking care of her patients, Dr. Haq enjoys traveling and spending time with her family.

Call Advanced Gastroenterology & Liver Institute or use the online booking button to schedule an appointment today.

Essam Quraishi, MD, is a board-certified gastroenterologist and the founder of Gastrointestinal and Liver Consultants in Santa Ana, Irvine, and Anaheim, California.

Dr. Quraishi graduated from medical school at Deccan College of Medical Sciences in Hyderabad, India. Moving to the United States, he completed his internal medicine residency at Henry Ford Hospital in Detroit, Michigan, and remained for his fellowship in gastroenterology in 2005. During his fellowship, Dr. Quraishi participated in multiple studies and presented original research on quality control in screening colonoscopies. Dr. Quraishi presented this research at several national gastroenterology conferences. Later in his career, Dr. Quraishi’s painstaking work on pancreatitis in patients with renal failure was published to high acclaim. 

Dr. Quraishi has a deep interest in general gastroenterology and hepatology and is well-equipped to handle all general pathology in these areas. His areas of interest include viral hepatitis, inflammatory bowel disease, and screening for colon cancer. Dr. Quraishi is well versed with the latest therapies for Hepatitis C, including interferon and ribavirin sparing treatment. He is experienced in administering the newest therapies for Crohn’s disease and Ulcerative Colitis. 

Dr. Quraishi believes in cultivating relationships with his patients and treating each patient as a whole. His philosophy is that you cannot treat an ailment the same for every patient; instead, each patient has to be approached individually, and the provider must tailor a treatment plan to fit the needs of each patient.

Dr. Quraishi enjoys playing chess, tennis, and soccer when not at the office. He also enjoys spending his free time with his lovely wife, Dr. Fatima, and their three young children.

Board-certified gastroenterologist Javed Sadiq, MD, offers superior services for his patients at Gastrointestinal & Liver Consultants in Santa Ana, Irvine, and Anaheim, California. 

Dr. Sadiq is a well-rounded medical professional with extensive experience in the field of gastroenterology. He holds a Bachelor of Science degree from the University of California Riverside with a Dean/Chancellor Academic Scholarship and went on to pursue a medical degree from Ross University School of Medicine. He graduated medical school magna cum laude (high honors).

After completing his medical degree, Dr. Sadiq underwent residency training in internal medicine at the State University of New York. He later completed a fellowship in gastroenterology at the same institution. Over the years, he has held several faculty positions in the division of gastroenterology and hepatology at several medical centers, including Arrowhead Regional Medical Center, St. Bernardine Medical Center, and San Bernardino Community Hospital. He served as the Chief Medical Officer at Mt. View Surgical Center.

Dr. Sadiq is highly skilled in various gastroenterology procedures such as screening and diagnostic colonoscopy, therapeutic colonoscopy, upper endoscopy, PEG placement, capsule endoscopy, and Bravo placement and analysis. He is board-certified by the American Board of Internal Medicine and the American Board of Gastroenterology and holds active medical licenses in California and New York. Dr. Sadiq has published several peer-reviewed journal articles and abstracts in the field of gastroenterology, including works on acute pancreatitis, stent-related complications, chronic pancreatitis pain, and more. With his broad range of experience, knowledge, and dedication he has been an asset to his patients.

In his free time, Dr. Sadiq enjoys staying updated on technology news, going for bike rides, and trying new cuisines from around the world. He is also fluent in English, Farsi/Persian, and Spanish.

Mehrdad Saliminejad, MD, is a board-certified gastroenterologist and founder of ProDigest Gastroenterology & Hepatology Associates in Lakewood and Long Beach, California.

Dr. Saliminejad — or simply Dr. Sal — opened his practice to provide individualized, high-quality patient care using the most advanced tools and techniques. 

After earning his Doctor of Medicine at Qazvin University of Medical Sciences in Qazvin, Iran, Dr. Saliminejad went on to complete his internal medicine residency and gastroenterology and hepatology fellowship at Tehran University of Medical Sciences in Tehran, Iran. 

Dr. Saliminejad relocated to the United States, completing both his internal medicine residency and gastroenterology fellowship training at The University of Southern California in Los Angeles, California. 

Dedicated to his profession, Dr. Saliminejad took an advanced endoscopy fellowship in endoscopic ultrasound at Montreal General Hospital in Montreal, Quebec, Canada.  

He was recruited by Southern Illinois University in Carbondale, Illinois, as an assistant professor of clinical medicine and became director of advanced endoscopy and interim chief of the gastroenterology division. 

After teaching residents and fellows for five years at SIU, Dr. Saliminejad moved back to Southern California to serve as director at Long Beach Memorial Medical Center’s Gastroenterology & Advanced Endoscopy Services in Long Beach. He also directs the gastroenterology clinic at the Todd Cancer Institute.

With years of experience managing complex medical problems, Dr. Saliminejad aims to provide the best care possible in a personalized, compassionate, and insightful manner. To better serve his diverse community, Dr. Saliminejad is fluent in English and Farsi and can communicate in Spanish.

In his spare time, Dr. Saliminejad enjoys learning new things and spending time with his family. 

Dr. Javadi was born in Iran and grew up in Houston, Texas.  She received her undergraduate degree in Biology from The University of Texas at Austin and went on to obtain her Master's from Texas State University.  She received her medical degree from St. George's University School of Medicine and completed her Internship and Residency in Internal Medicine at Albany Medical Center in New York.  

She moved back to Houston to complete her Fellowship in Hepatology at The University of Texas Medical School in Houston, where she stayed on as an Attending Physician. 

After moving to Los Angeles in 2006, Dr. Javadi worked as Assistant Professor of Clinical Medicine at Keck School of Medicine of the University of Southern California (USC).  She subsequently accepted an Assistant Professorship at Southern Illinois University School of Medicine to care for patients with Liver disease, and continued to train Residents and Fellows.  

Dr. Javadi eventually moved back to the Los Angeles area and joined ProDigest Gastroenterology & Hepatology Associates, to continue caring for patients with liver disease.  She is Board Certified in Internal Medicine and is a member of American Association for the Study of Liver Diseases.

Dr. Javadi is dedicated to helping patients with liver disorders, including fatty liver, viral Hepatitis, and management of liver cirrhosis/end-stage liver disease that may require liver transplant evaluation.  Her detailed and humanistic approach to providing care for patients with liver disorders is built on years of experience at various academic centers.

Dr. Javadi looks forward to serving the people of Southern California. 

He obtained his undergraduate degree at University of Berkley in Northern California in 1962. He subsequently attended and completed medical school at the University of California, San Francisco (UCSF) in 1966 with a Postgraduate in 1967. He then joined the U.S. Army from1967-1969.  He pursued his Residency in Internal Medicine at The University of Southern California - Keck School of Medicine (USC) from 1969-1972, with an additional Gastroenterology & Hepatology Fellowship also at USC 1972-1974.He opened his own Gastroenterology Private Practice in Whittier, CA from 1974-2015 and additionally joined our GI group here in Lakewood, CA in 2016.

Dr. Robert M. Webman runs a private practice in the Hawthorne, Torrance, and San Pedro, California, areas where he practices as a Gastroenterologist, Internist and Primary Care Doctor. He provides extensive patient management and medical care to clients in both the hospital and office environment. Some of the procedures Dr. Webman performs include: colonoscopy, capsule endoscopy, liver biopsy, polyp removal, upper endoscopy, flexible signoidoscopy, ERCP, and hemorrhoid banding.

The Consumers’ Research Council of America named Dr. Robert M. Webman as one of the country’s top gastroenterologists. Dr. Webman also performs as an Associate Professor of Clinical Medicine at Harbor-UCLA Medical Center. An expert in liver and digestive disorders, pancreatic disease, and diagnostic endoscopy, Dr. Webman has received Certificates of Achievement for Volunteer Clinical Services and the 1999 Educator of the Year award from the hospital. Additionally, Dr. Webman lectures on nutrition and cancer at schools and hospitals.

Dr. Robert M. Webman studied at the University of Massachusetts, Amherst, where he graduated Phi Beta Kappa. He received his medical degree from the University of Massachusetts Medical School in 1978. Dr. Webman completed his internal medicine residency at Good Samaritan Hospital in Los Angeles and a gastroenterology fellowship at Tulane Medical Center in New Orleans. Dr. Robert M. Webman belongs to the Los Angeles County Medical Association, the American College of Gastroenterology, and the California Medical Association.He also donates to the American Breast Cancer Foundation, the Jewish National Fund, and The Children’s Hospital Foundation. In his free time, Dr. Webman spending time with his family, playing tennis, film, and travel.